Add command server

custom/command_server.go

@@ -0,0 +1,16 @@
+package main
+
+import "github.com/sagernet/sing-box/experimental/libbox"
+
+var commandServer *libbox.CommandServer
+
+type CommandServerHandler struct{}
+
+func (csh *CommandServerHandler) ServiceReload() error {
+	return nil
+}
+
+func startCommandServer() error {
+	commandServer = libbox.NewCommandServer(&CommandServerHandler{}, 300)
+	return commandServer.Start()
+}